Methods and systems for temporarily sharing position data between mobile-device users

ABSTRACT

A system for exchanging GPS or other position data between devices for purposes of group activities, child location monitoring, work group coordination, dispatching of employees etc. Cell phones and other wireless devices with GPS receivers have loaded therein a Buddy Watch application that communicates with a remote Buddy Watch Server. The server gets or maintains position data for the wireless devices. When the server receives a request from a first device to set up a temporary position-sharing relationship between it and a second device, the server facilitates symmetrical position sharing between the two devices. While the relationship is active, the server can receive updated position data from one or both devices, and if necessary calculate or recalculate a path based on the updated data. The server can also alert one of the devices should the other move too close to or too far from a specified location. The request message or messages used to establish the temporary position-sharing relationship may include a timeout specifying when the server is to sever the position-sharing relationship.

CLAIM OF PRIORITY

This application is a continuation application of U.S. patent application Ser. No. 13/188,414, filed Jul. 21, 2011, which itself is a divisional of U.S. patent application Ser. No. 12/075,408, filed Mar. 11, 2008, entitled “METHODS AND APPARATUSES FOR TRANSMISSION OF AN ALERT TO MULTIPLE DEVICES,” which itself is a continuation of U.S. patent application Ser. No. 11/099,362, filed Apr. 4, 2005, now issued as U.S. Pat. No. 7,353,034; each of these applications is entitled “LOCATION SHARING AND TRACKING USING MOBILE PHONES OR OTHER WIRELESS DEVICES.” Priority is hereby claimed under 35 U.S.C. §120 or 365(c), and each of these applications is incorporated herein by reference.

FIELD OF USE AND BACKGROUND OF THE INVENTION

The cellular market in 2003 was around 150-160 million devices in the US and the number is growing at over 10% per year at least. Europe already has 320 million cell phone users, and the global market is over 1.4 billion devices.

Cell phone carriers are looking for opportunities to increase both revenue and profits by providing new services. For example, recently cell phones have been provided with browsers to allow surfing the internet from the phone. One of the needs businesses, families and individuals have is the need to know where their employees, children and friends are. No two way position information sharing technology currently exists as far as the applicant is aware.

The one way location sharing prior art includes On Star and the Mercedes Benz TeleAid services where, via GPS receivers and cellular phone capability built into a car, an aid center can track cars all over the world and speak with the occupants and sense when the cars airbags have deployed. Other commercial services allow parents to track the locations of their children in a one way location sharing manner. None of these services allow the occupants of the car to know where the aid center is or allows the children to know where their parents are.

Another need is for a system for use by motorists, hikers, pilots and boatmen to allow them to be able to contact rescuers and know the location of the rescuers as they come to the aid of the stranded person and to allow the rescuers to know the location of the victims they are trying to rescue. The need requires that cell phones have the capability to be reconfigured in the field to add an “instant buddy” to the list of people with whom location information is shared. The prior art kid tracking systems could not be reconfigured in the field to add new individuals with whom location information was to be shared.

DIFFERENCES OVER KID TRACKING PRIOR ART

In the prior art, one could buy phones that were set up at the manufacturer to enable parents to locate their children. One such service allows up to eight phones to be used and allows parents to monitor the locations of their kids. But these services do not allow the kids see the locations of their parents because the service is not set up to share location information between phones. In other words, it is a one way service with the kid's locations being sent to the parents phones for display but not vice versa. Further, there is no mechanism to add groups and members of groups, and there is no mechanism to set up “instant buddies” as that term is used below (temporary location sharing between phones on an ask and accept basis which automatically expires after a configurable interval terminates). The kid locator phones are set up at the factory and nothing can be changed in the field by the users and they are always on and cannot be disabled.

It is useful to be able to share locations among multiple cell phones which have GPS locator ability. Such an ability would be useful for people in groups who have made plans to meet at specific locations at specific times. When one person is late, the others in the group would be able to ascertain the tardy person's location. To alleviate privacy concerns, it would be useful to be able to turn off location sharing or to program location sharing so that it turns itself on automatically at some date and time and turns itself off at some other programmable date and time. It would also be useful to have a map display on cell phones which are picture enabled and to plot the locations on the map of persons in a group who have their location sharing capability turned on.

SUMMARY OF THE INVENTION

The invention contemplates 2.5 GHz and 3 GHz Java enabled, web enabled (or similar) cell phones and Personal Digital Assistants or other web enabled wireless products with global positioning system (GPS) receivers and sufficiently large liquid crystal displays for the preferred embodiment. The phones must be web enabled to be able to send and receive TCP/IP or other protocol packets over the internet to the Buddy Watch server.

In some embodiments where push-to-talk enablement is implemented, GPS receivers are not necessary in the cell phones but they must be web enabled to be able to send and receive TCP/IP or other packets over the internet to the Buddy Watch server.

These phones and other wireless devices are programmed with software (programmed at the factory or downloaded from the assignee of the present invention) to have the user interface and functionality described herein to allow mutual tracking and optional position mapping displays of members of groups and of instant buddies coming to the rescue of stranded motorists, hikers, pilots and boatmen. These phones work with a Buddy Watch™ server coupled to the internet. The server is not limited to any specific language or technology nor is it limited to any specific wired or wireless solution or any particular transmission physical layer or protocol.

The teachings of the invention do not require development of new cell phone or PDA technology nor do they require development of new cellular communication infrastructure. The functionality implemented by the software of the invention utilizes existing platforms and infrastructure. In the preferred embodiment, the software of the invention is developed to JAVA specifications.

In its primary mode, the process of the invention only allows exchanging and mapping of position data with persons on a Buddy List™ programmed into a Buddy Watch™ (synonym for Buddy Tracker™) device (defined as any of the devices mentioned anywhere in the specification when programmed to operate in Buddy Watch mode or coupled to another device operating in Buddy Watch mode). The user must allow others on his Buddy Lists to “see” his location (location sharing may be turned off), and the user must request to see the location of others on his Buddy Lists to be able to have their positions reported and/or mapped. Position information exchanged via radio transmission on the cellular infrastructure is encrypted so that outsiders cannot see or use location information that is transmitted. A simple menu structure allows easy setup and management of Buddy Watch application programs. The keypad of the phone or PDA is used to enter information into the Buddy Watch enabled device. Online help is available to setup and use the Buddy Tracker application program(s).

The teachings of the invention can also be integrated into other products and services such as autos with GPS based navigation systems. This would be done by expanding the navigation system to have a cellular transceiver capable of sending and receiving digital data including position data to the Buddy Tracker server. It could also be done by expanding the GPS navigation system product to have a USB or other interface port to couple the system to a cell phone or PDA of the type described above. This interface would allow the GPS navigation system to receive position data from the wireless digital data transceiver and map the position data on the GPS navigation system display of the auto. Handheld GPS navigation devices can also be expanded by integrating a cell phone therein or providing a port to interface to a cell phone to exchange position information with the Buddy Tracker server.

In a system employing the teachings of the invention, the users can change things on the fly in the field such as: adding groups and members; adding instant buddies, changing the size of the area in which their buddies can be tracked, enabling or disabling the location information sharing function without disabling the phone, etc.

Some of the benefits of the Buddy Tracker technology are that it allows businesses to easily identify which service persons are closest to the next job and to let personnel in the field know the positions of their co-workers and to share their location with their co-workers. Parents can keep track of where their kids are. Friends can keep track of where their buddies are and share their position with their buddies. Location information will be shared only so long as the phone is on and in an area where the device can receive a GPS signal and send the phone's coordinates out on the cellular network (and the location sharing capability is enabled).

Further, the cellular carriers do not have to invest in engineering or infrastructure to offer the Buddy Watch functionality. The software that implements the Buddy Watch functionality can be downloaded from the web or installed at the point of sale of a cell phone or PDA. Use and sale of an application that makes use of the on-board GPS capability of cell phones and PDAs built to comply with the E911 requirement allows the carriers to recoup some of the costs imposed upon them by the E911 requirement.

Enhancements to cellular phones in recent years such as the addition of cameras and web browsers have lost track of one of the basic reasons for cell phones in the first place—people want to communicate with and know where other people are. This is applicable to parental monitoring and increasing the efficiency of business and increasing the effectiveness of law enforcement. The Buddy Watch system also functions to decrease the load on the 911 system since not every situation requires the help of 911 authorities.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a screen shot of a typical opening screen which would be displayed on a cellphone with the BuddyTracker™ software enabled.

FIG. 2A shows a block diagram of the Buddy Watch system.

FIG. 2B illustrates a matrix or web of supervisorial relationships and Buddy Lists.

FIG. 2C is a diagram of the start-up screen.

FIG. 2D shows the Mapit page.

FIG. 2E shows additions options for manual refresh, etc. which can be reached by scrolling down the Mapit page below the list of active users. FIG. 2F is a screen of active users.

FIG. 3 represents a display in the user interface which shows individuals on the phone's Buddy List as well as a group of buddies which has been given the name Tennis Team.

FIG. 4 is a user interface display showing the result when the tennis team Buddy List entry is selected and the information that is displayed when one of the members of the tennis team is selected for display of location information.

FIG. 5 is a user interface display showing a map rendering with the location of a selected member of the tennis teach group displayed thereon.

FIG. 6 is a user interface display showing a map rendering with the location history of a selected member of the tennis team rendered thereon.

FIG. 7 is a screen shot of a display in a typical system employing the invention showing positions and status of members of a selected group.

FIG. 8 is a screen display showing what is displayed when Dean is selected and the Mapit command in box 48 is given by double clicking on the box or by any other means.

FIG. 9 is a screen shot of an instant buddy display after an instant buddy relationship has been set up.

FIG. 10 is a screen shot of a typical display in a system employing the teachings of the invention to establish an instant buddy ID in box 70, and give the instant buddy a caller ID in box 72 (the instant buddy's caller ID or phone number is used by default).

FIG. 11 is a screen shot of the display which appears on at least the instant buddy's phone after a stranded motorist, pilot or hiker has contacted 911 and entered a caller ID and carrier for a proposed instant buddy.

FIG. 12 is a block diagram of a typical prior art cellular system infrastructure in which the method and apparatus of the invention work in a peer-to-peer embodiment.

FIG. 13, comprised of FIGS. 13A and 13B, is a flowchart of the method of exchanging GPS position data among cell phones of a watch list.

FIG. 14, comprised of FIGS. 14A, 14B and 14C, is a flowchart of processing of an embodiment that implements several modes of operation.

FIG. 15 is a flowchart of the process of establishing an Instant Buddy Relationship.

FIG. 16 is a block diagram of a typical cellular system coupled by a gateway and a Wide Area Network such as the internet to a Buddy Watch server to provide the infrastructure of the invention.

FIGS. 17A and 17B are a flowchart of the preferred Instant Buddy Setup process.

FIGS. 18 and 19 are diagrams of some of the user interface display screens involved in the Instant Buddy Setup process.

FIGS. 20A and 20B are a flowchart of the process of enabling the personal bread crumbs mode and how it works.

FIG. 21 is a flowchart of another embodiment of a process to establish and use the personal bread crumbs mode.

FIG. 22 is a flowchart of the preferred embodiment for the instant buddy setup process.

FIG. 23 is a flowchart of another embodiment of a process to receive buddy location update requests and process them.

FIG. 24 is a diagram of the default start screen and some of the other user interface screens that the user can navigate to from the start screen.

FIG. 25 is a help screen showing how navigation to a view new alarms screen can be accomplished.

FIG. 26 shows the tree structure of a plurality of other screens which can be used to add target locations, annotate the target locations with text, voice or photo notes, add a text message, give commands to take a picture or find a picture file, record a voice message to be appended to the target, request position updates for all active buddies, map the positions of all active buddies or select particular buddies for mapping or requesting a position update.

FIG. 27 shows a number of screens which can be displayed to map the position of a selected user with history and give information about the user as well as send short text messages, record and send voice messages, photos, Instant Messenger links, target positions, etc.

FIGS. 28A and 28B show user interface screens created by Buddy Tracker software to create settings such as bread crumbs on or off, security codes for personal bread crumbs tracking and verification that a user is OK, set checkup timeout intervals, establish phone numbers and email addresses of other users to call in case of emergency in personal bread crumbs mode, add, change or delete group names, set the Mapit screen radius, refresh rate and update setting, refresh time, delta position change for refresh.

FIG. 29 shows the user interface screens to create a new buddy and showing the communication paths and accept protocol to do this.

FIG. 30 is a diagram of the user interface screens for defining, deleting and using map rooms for closed proximity groups, open proximity groups, etc.

FIG. 31 is a block diagram of the system for TalkControl to simplify cell phone walkie-talkie operations.

FIG. 32 is a flow diagram of a process a user of a walkie-talkie enabled phone can initiate to join a talk group to enable subsequent walkie-talkie operations.

FIG. 33 is a flowchart of the process the Rubicon server carries out to automatically delete a user.

FIG. 34 is a flowchart of the process the Rubicon server carries out to allow a supervisor to add a user.

FIG. 35 is a flowchart of the process for a supervisor to edit a user in a talk group.

FIG. 36 is a flowchart of a process for a supervisor to delete a user from a talk group.

FIG. 37 is a flowchart of a process for a supervisor to issue a token.

FIG. 38 is a flowchart for the process of setting up preferences.

FIG. 39 is a flowchart of the process to allow a supervisor to request status.

FIG. 40 is a process flowchart of the process for a supervisor to create a group.

DETAILED DESCRIPTION OF THE PREFERRED AND ALTERNATIVE EMBODIMENTS

FIG. 1 is a screen shot of a typical opening screen which would be displayed on a cellphone with the Buddy Tracker™ software enabled on the phone. FIG. 2A is a block diagram of the Buddy Watch system. A Buddy Watch or Rubicon server communicates with wireless devices 2 through 6 via the internet 9 and wireless carrier systems 7 and 8. In the claims, the Buddy Tracker software is called the GPS position data sharing software application and it is resident on each of wireless devices 2 through 6. Generally, communication between the handsets and the Rubicon (Buddy Watch) server occurs as follows. Each handset communicates data packets through its local cellular carrier network via TCP/IP compliant data packets encapsulated in cell system packets. The carrier network tower receives the packets and strips off the cellular encapsulation and forwards the TCP/IP packet to an appropriate gateway connected to the internet 9. Routers in the internet route the packet to its destination, generally the Buddy Watch server 1. The receiving server validates the content of the IP packet to authenticate the sender as a registered Rubicon user and to verify that the sending phone EIN matches the phone EIN stored in the server. Once authenticated, the packet content is processed by the server. A response to the request in the packet is prepared using information from a database maintained by the Rubicon server and any associated map needed for the response is requested from a map server. The complete response is compiled, including any data needed to render a map on the recipient wireless device display and packetized into a TCP/IP packet and sent back to the originator of the request via internet routers and carrier gateways that couple the wireless carrier systems to the internet. The gateway of the carrier identifies the correct tower for the cell in which the recipient's phone is currently resident and the packet is encapsulated in a cell system packet and forwarded to the appropriate tower where it is transmitted wirelessly to the cell phone or other wireless device of the recipient. The wireless device then recovers the data in the TCP/IP packet and the port address in the TCP/IP packet header causes the packet to be routed to the Buddy Watch software where it is processed.

FIG. 2C is a diagram of the start-up screen. On startup, each handset starts its GPS sampler and the Buddy Watch application program. If Main is pressed, the user is taken to the Nextel default page (or whatever other carrier is being used). If Mapit is selected, the user is taken to the Mapit page shown in FIG. 2D. FIG. 2D shows the Mapit page where the positions of active users within the radius set up in the preferences of the center point XXX within radius YYY is shown. Scrolling down the Mapit page below the map is the list of active users including those outside the radius. FIG. 2E shows additional options for manual refresh, etc. which can be reached by scrolling down the Mapit page below the list of active users. FIG. 2F is a screen of active users. Color is used to highlight items. Scrolling to a user and pressing OK gives two options: re-centering the map on the user and displaying details of that user.

The Buddy Tracker software creates the displays such as that shown in FIG. 1 and other user interface displayed discussed elsewhere herein. FIG. 24 is a diagram of the default start screen and some of the other user interface screens that the user can navigate to from the start screen. This is a help/emergency screen 15 which has a next command 19 which can be selected to take the user to the 911 screen 17 which can be used to take the user to a screen 21 wherein the user can select the type of help requested. FIG. 25 is the help screen and shows how navigation to view a new alarms screen can be accomplished. FIG. 26 shows the tree structure of a plurality of other screens which can be used to add target locations, annotate the target locations with text, voice or photo notes, add a text message, give commands to take a picture or find a picture file, record a voice message to be appended to the target, request position updates for all active buddies, map the positions of all active buddies or select particular buddies for mapping or requesting a position update. FIG. 27 shows a number of screens which can be displayed to map the position of a selected user with history and give information about the user as well as send short text messages, record and send voice messages, photos, Instant Messenger links, target positions, etc. FIGS. 28A and 28B show user interface screens created by Buddy Tracker software to create settings such as turning bread crumbs on or off, security codes for personal bread crumbs tracking and verification that a user is OK, set checkup timeout intervals, establish phone numbers and email addresses of other users to call in case of emergency in personal bread crumbs mode, add, change or delete group names, set the Mapit screen radius, refresh rate and update setting, refresh time, delta position change for refresh. FIG. 29 shows the user interface screens to create a new buddy and shows the communication paths and accept protocol to do this. FIG. 29, is discussed more below, and is a representation of the screens and protocols to initiate and accept an instant buddy relationship. FIG. 30 is a diagram of the user interface screens for defining, deleting and using map rooms for closed proximity groups, open proximity groups, etc. For closed proximity group map rooms, listed users can set their preferences to automatically enter or be alerted that they are in the Zone and manually decide to enter. For Open Proximity Group Map Rooms, anyone can join by opting in from their phone or from a sponsor's website. Upon entry, they can view and be viewed by all other members in the map room. Proximity rooms are useful to find and be found by friends attending an event.

In FIG. 1, area 10 discloses that the Buddy Tracker location sharing application software is active and is sharing the location of the phone with other members of a designated group. Area 12 indicates that parental status is active which means that the employer of the employee carrying the phone or the parent of the kid carrying the phone can see the location of the employee or kid if the phone is on. When parental status is active, the supervisory function cannot be turned off or evaded. This supervisory location sharing can be hierarchical such that an employer can see the location of all its employees, and each of the employees can be set up as supervisor of their children such that the employees can see the locations of their children, but the employer of each employee cannot see the locations of the children of each employee. The supervisorial relationships can be set up to define a matrix or web of Buddy List and supervisorial relationships, such as is illustrated in FIG. 2B.

In FIG. 2B, phone A has phones C and D on its Buddy List and is set up as the supervisor of those two phones. Phone B has phones A, G, F and E on its Buddy List and is set up as the supervisor of those phones. Phone H has phones E, J and I on its Buddy List and is set up to supervise those. Phone K has phone I on its Buddy List and is set up to supervise phone I.

Each of the phones in FIGS. 2A and 2B is coupled to the cellular carrier infrastructure in a conventional manner and can send phone calls or short text messages or email messages to any other phone including the cell phones represented by lettered circles in FIG. 2B. FIG. 12 is a block diagram of a typical prior art cellular system infrastructure in which the teachings of the invention in a peer-to-peer embodiment can be practiced. An area of the country is divided into several cells represented by circles such as 93 and 95. Inside each cell is a transceiver tower, represented by blocks 94 and 96 which carries out time division multiple access or code division multiple access digital radio communications with cell phones in its cell. The cell phones or PDAs are represented by autos 98 and 100. Data recovered from the cell phone transmissions is transmitted to a central switching system 102 by data paths such as 104 and 106. The central switching system 102 is coupled to a public service telephone network 108.

Transmissions from one cell phone to another take place via the towers such as 94 and 96 and the central switching system 102. For example, suppose cell phone 98 wants to send its GPS location data to cell phone 100 and cell phone 100 wants to send its GPS location data to cell phone 98. The system of the invention uses some communication protocol such as XML, modified short text messages or other methods to send GPS location information to all cell phones on a Watch list. XML is a slimmed down version of SGML and enables Web authors to create their own tags so that they can more accurately capture the structure of their data. Because this structure can be read by SML-compliant browsers, the information encoded in these tags can be made available to programs such as Java applets or it can be displayed by formatting the XML tags with a style sheet.

In the preferred embodiment, the wireless devices in a group which has location tracking turned on periodically send their GPS position data to all the other members in the group. The process for each wireless device to send its position data to any other wireless device in the group is as shown in FIGS. 13A and 13B. Basically, FIG. 13 is a flow chart of the process of two or more cell phones exchanging encrypted GPS position data. FIG. 23, discussed below, is a flowchart of another embodiment of a process to receive and process Buddy location update requests. The process of FIG. 13 starts at step 110 with a request for a position update. In the preferred embodiment, this happens when a user of a Buddy Tracker phone uses his phone to make a request for a location update. In other embodiments, location updates can be requested automatically and periodically by the Buddy Tracker software on a device that is reporting its position. In other embodiments, a position update can be automatically generated by a device which is reporting its position to other members of a group whenever the position of the device has changed from its last reported position by a programmable amount. The requested position update may be sent to everybody on a selected Buddy List or just a single person's wireless device. In some embodiments, the position update is sent to some subset of persons on a selected Buddy List. Step 112 represents the process of looking up the addresses for all people on the selected Buddy List, a watch list, or just a selected individual or a subset of individuals from a watch list, as the case may be. Some embodiments may be limited to position updates on entire Buddy Lists.

Step 114 represents the process of reading the GPS position data from the built in GPS receiver of the phone (or the GPS receiver of the navigation system) and encrypting the position data.

In step 116, cell phone 98 puts its encrypted GPS location data into a message according to the chosen communication protocol (assume short text message—SMS for short) and addresses the message packets to the one or more phones of the selected persons with which position information is to be shared.

In step 118, the SMS message packets are transmitted to tower 94 using whatever physical layer protocol the cellular system uses such as TDMA or CDMA. The header of the SMS packets contains data indicating the payload data is to be sent to the Buddy Watch software of a particular cell phone and not to the inbox of the phone's SMS software. The payload data of these packets is the encrypted GPS position data. The physical layer protocol typically involves the following steps. First, the packets are disassembled into groups of bits of some predetermined size called codewords the size of which depends upon the particular configuration of the forward error correction software. The codewords are then interleaved to help defeat burst errors. Each codeword can then be encoded with error detection and correction bits such as by using Reed Solomon encoding. The codewords are then broken down into groups of bits called constellation points. The number of bits in each group depends upon the type of modulation scheme in use. In some embodiments, the groups of bits are then further encoded in a Trellis encoder.

The encrypted GPS position data packets would be addressed such that they would be routed in the cellular system to all the other wireless devices using the Buddy Tracker software which requested a position update. This is done by routing the packets to the cell transceivers in the cells in which the wireless devices which require updates are currently registered, as represented by step 120. For example, if cell phone 100 in FIG. 12 is on the Watch list or is being automatically updated or has requested a position update manually, it will have transmitted a packet to transceiver 96 indicating it needs a position update and, when the wireless device entered cell 95, it will have exchanged packets with transceiver 96 to achieve synchronization with transceiver 96 and to register in cell 95. Each wireless device that is registered in a cell will have done this, and the transceivers in each cell will communicate with the central switching system 102 to indicate which wireless devices are registered in their cells. Therefore, the routers in central switching system 102 will know which wireless devices are registered in each cell and will know which wireless devices are to receive position updates. Step 120 represents the process of receiving the signals from each wireless device that are modulated with constellation points that contain the data of packets that contain GPS positions, recovering the data from the constellation points and doing error detection and correction and recovering the GPS position data packets. These packets are then routed to the central switching system which uses the destination addresses in the packets and its routing tables to route them to the transceivers in whatever cell or cells the wireless devices that require position updates are registered. There, the packets are disassembled, encoded with error correction and detection data, and assembled into symbols or constellation points in whatever type modulation (QAM, QPSK, etc.) is being used and transmitted to the wireless device. This happens for every wireless device on a watch list or which has requested a position update.

At each wireless device which receives the signals modulated with the constellation points bearing the GPS position data, the data of each packet is recovered and the packet is reassembled, as symbolized by step 122. The header data of the packet (the port number in the case of TCP/IP packets) causes the wireless device to pass the packet to the Buddy Tracker software which is monitoring a particular port, step 124. When a packet is passed to that port (or just the payload data thereof), the payload data is decrypted and the position data recovered, step 126. Step 126 also represents the process of reading the header data of the incoming packets and determining which other member of a buddy group sent the position update so that the position information for the proper member of the Buddy Group is displayed. The position data is then used to display the position of the other party in the group who sent the packet, and, if the user gives the “Mapit” command, the position data will be converted to a waypoint on a displayed map so as to graphically display the position of the wireless device which sent the packet.

Step 128 represents the process of the device which received the position update encrypting its own GPS position into short message or email packets addressed to the other members of a Buddy Watch group or to a single other wireless device. These packets are then sent to all the other wireless devices by the same process described in steps 116, 118, 120, 122 and 124 of FIGS. 13A and 13B, as represented by step 130.

FIG. 23 is a flowchart of another embodiment of a process to receive buddy location update requests and process them. Step 220 represents requesting a buddy location update. Addresses of all persons on the buddy list or just a selected buddy are located in step 222. Message packets are generated in 224 addressed to the selected Buddy List or individuals, and encrypted position data is put in them. A request is sent—226, and these packets get routed to the Rubicon server—228. The initiator and recipient are authenticated—230, and the packets are forwarded to the recipients via the cell system. The cell system forwards the packets to whatever cell each recipient is in—232. The packet arrives and causes a GPS position request to be made in each wireless device—234. The device captures its current GPS position, and encrypts it and packetizes the GPS position in the payload portion of a packet addressed to the Rubicon server with information as to the requestor in some embodiments. The packet is then sent with a timestamp to the Rubicon server for forwarding to the requesting Buddy—238 and 240. The Rubicon server authenticates the initiator and the recipient and forwards the packet to the initiator via the cell system—242. The cell system forwards the packet to the cell where the initiator recipient is located—244. The initiators cell phone receives the packet, and recovers the timestamp—246, and reads the packet header and port number of the GPS information and uses the port number to route the packet to the Buddy Tracker software—248. The Buddy Tracker application program on the initiator's cell phone receives and decrypts the GPS information from the packet, displays the position of the Buddy, and uses information in the header to determine which other Buddies sent position updates—250. The wireless device of the initiator responds to the position update of each Buddy by sending a reply packet with the encrypted position of the initiator—252. Each requested Buddy device updates the Rubicon server and the wireless device of the requesting buddy with its position—254.

Out of Coverage Update Response

In some embodiments, when a wireless device requests an update from another wireless device, and the other wireless device is out of cellular coverage, a timeout occurs. When a timeout occurs without receiving a position update, the wireless device expecting the update changes its display to yellow or some other color for the wireless device which is out of coverage. The Buddy Watch system only works when the phone is on and in a cellular coverage area.

Buddy Watch Modes

FIG. 14, comprised of FIGS. 14A, 14B and 14C is a flowchart of processing of an embodiment that implements the several modes described below. The steps that are numbered with like numbers to steps in FIG. 13 represent the same functionality.

1) Disable: The Buddy Watch application can be disabled by the user. When disabled, the wireless device does not share its GPS position data with any other wireless device so no other buddy can see your position. There is an exception for the parental monitoring function. When parental monitoring is turned on, as symbolized by line 111 in FIG. 14A, the wireless device always shares its GPS position and cannot be disabled. The disable functionality is represented by test 113 in FIG. 14A which determines when a position update is requested whether the Buddy Watch function has been turned off. If so, processing proceeds to test 115 which determines if parental monitoring is turned on. If not, processing proceeds back to step 110 along line 117 and GPS position sharing does not happen. If the Buddy Watch function has not been disabled, processing proceeds to step 112 to look up the addresses of the wireless devices to which the position update is to be sent. When the Buddy Watch application is disabled and it has been operating and parental monitoring is not turned on, a final position update is sent is sent to those wireless devices on the current Watch List (the wireless devices which are active and monitoring each other's positions).

2. Enable: This is the normal mode of operation. Buddies can be added or deleted from the Watch List at any time. Any wireless device that is operating and on the Watch List can find the location of any other device on the Watch List by issuing a position update request. If a buddy is removed from a Buddy List, he or she is not able to receive position updates. Multiple lists can be joined to form a group.

3. Supervisor—Parental/Corporate Code: In this mode, as long as the wireless device of the worker or child is on, the supervisor will be able to monitor position by GPS position updates. The worker or child will not be able to disable the Buddy Watch feature nor remove the parent or supervisor from the Watch List. Only the supervisor or parent will have the necessary password to remove himself from a Buddy List or watch list.

4. Buddy Lists: This is the normal mode of operation. Buddies can be added or deleted from a list at any time. If a buddy is off a Buddy List, he cannot receive position updates from any other wireless device on the list. Multiple Buddy Lists can be joined into a group and entire groups may be enabled and disabled. Workgroup lists are lists of buddies which need to be aware of the location of their coworkers during working hours but not after. Buddy Lists or Buddy Groups are a means to have a single icon, folder or some similar graphic user interface (GUI) mechanism to represent a list of people and enables single commands to turn on or turn off tracking of a group of people. If a folder is used for each Buddy Group, a drop down list showing the specific names and locations of each person on the list can be displayed when the folder or icon representing the group is selected. If an icon is used, the Buddies would be grouped in and shown on the phone display. Groups receive a color on the GUI and the members of the group are connected by a translucent shaped outline encompassing all the points representing positions on the Mapit display. If the group is spread too far apart to be shown on a single Mapit display, then the shaped outline for the group is not shown and on the specific color coded Buddy positions that can be shown are shown. If the Mapit display is zoomed out, the translucent group outline returns when all members of the group can be shown on a single screen. Buddies that are in multiple groups are colored a non group color or the color of any of the displayed groups. If groups overlay and when Buddies that are in two active groups are shown, the translucent outline shall overlap as needed, and only cover Buddies that exist in both lists.

5. Instant Buddies: Instant Buddies can be created when a call is placed between two cell phones, phone enabled PDAs or other wireless Buddy Watch enabled devices. FIG. 15 is a flowchart of the process of establishing an Instant Buddy Relationship. The first step is 132 where the wireless device places or receives a call from a Buddy Watch enabled wireless device to or from another Buddy Watch enabled wireless device. The two users such as a stranded motorist and a tow truck driver discuss the situation and decide to establish an Instant Buddy relationship. After the call is established, and the two agree to allow it, the two wireless device users can click on the Instant Buddy menu choice in the Buddy Watch menu, as symbolized by step 134. The wireless devices then each display an Instant Buddy Setup screen like that shown in FIG. 11 (step 136) and fill in the appropriate data (fields 84, 88 and 86) in step 138. Both users then indicate their acceptance (field 92 or deny the relationship (field 90), or in some embodiments, only the recipient of the call needs to accept or deny the relationship. Once the Instant Buddy relationship is accepted, the two wireless devices start exchanging position data (step 140). After 24 hours, or some other time set in the Instant Buddy preference menu (timeout checked in step 142), Instant Buddies are discarded (step 144). The Instant Buddy preference menu allows the time period for the Instant Buddy relationship to be set to something other than the default value of 24 hours.

Preferred Instant Buddy Setup Process

FIG. 16 is a block diagram of a typical cellular system coupled by a gateway and a Wide Area Network such as the internet to a Buddy Watch server to provide the infrastructure of the invention. The cellular system shown in FIG. 16 is typical and has the same structure and operation as the cellular system of FIG. 12. What is new is the connection between the central switching system and a Buddy Watch server 146 through gateway 148. The purpose of this will be made clear in the following discussion of the preferred Instant Buddy setup process.

Buddy Watch Server Functions

The Buddy Watch server's main function is to serve maps to the cell phones registered in the Buddy Watch system and implement GPS position data exchanges between itself and the phones on a buddy list to enable members of a buddy list to view the locations of other members of the list. In some embodiments, the Buddy Watch server also downloads application software as needed to phones registered in the system as the phones send packets to the Buddy Watch server indicating a particular command has been given which requires an application program on the phone which is not present.

In the preferred embodiment, the Buddy Watch server runs all the application programs on the server and just sends pages to be displayed on the phone to solicit the user to enter data needed to implement a function.

If the phones had as much memory as the Personal Digital Assistants, the application programs could be loaded and run on the phones themselves.

Other functions of the Buddy Watch server are: setup of user profiles, billing and database access and maintenance.

Purchase/Payment Activate Deactivate Key

The functions of the Buddy Watch server will be made clear in discussions which follow. But one of its functions will be to manage activate and deactivate codes. The Buddy Watch application will be a service which a cellular carrier offers on a subscription basis. When a subscriber buys a Buddy Watch enabled phone, he will be issued an activation code and the Buddy Watch server will also be given the activation code. This activation code will be kept in active status as long as the subscriber has paid for the service. Subsequent communications of packet data between the Buddy Watch server and the phone such as downstream position updates of positions of buddies on a Buddy List, receipt of phone position for use in updating other buddies on a Buddy List, etc. will only be enabled as long as the activation code is in active status. When the subscriber stops paying for the service, the activation code will be changed to a deactivation code status, and subsequent communication between the phone and the Buddy Watch server will be impossible. The Buddy Watch server implements this functionality by checking the activation code status each time before communication with a phone is carried out.

The Buddy Watch application is downloaded via the internet for subscribers who do not already have it on their phones. The customer receives an activate code to key into the phone, or an activation application on the Buddy Watch server receives confirmation of the purchase and automatically sends the activate code to the phone/Personal Digital Assistant and receives back a confirmation. Each month, payment for the service is required. Failure to make the payment results in an application receiving a request to deactivate the Buddy Watch application on the phone/PDA. A deactivate code is sent and a response is received back confirming the phone application has been deactivated. Further attempts to use the application are met with a simple display indicating the service subscription has expired.

The protocol to activate and deactivate the Buddy Watch application is secure in the preferred embodiment.

FIGS. 17A and 17B are a flowchart of one embodiment for an Instant Buddy Setup process. FIGS. 18 and 19 are diagrams of some of the user interface display screens involved in the Instant Buddy Setup process. All three figures will be referred to in the following discussion. In the preferred embodiment, the Instant Buddy relationship is set up in the following manner.

-   1) An initiator selects the Instant Buddy menu choice options in     step 150. This is done by selecting menu option 151 of screen 153 in     FIG. 18. This causes a transition to display screen 155 on the     initiator's device where the user selects menu option 157. This     causes a transition to screen 159 on FIG. 19 which is the Instant     Buddy setup screen. This screen shows the initiator's phone number,     Instant Buddy ID and Screen ID in auto filled fields 161, 163 and     165, respectively (step 152). There is also a timeout field 167     which the initiator can set to some time if the default time of     midnight is not acceptable (step 154). After filling in the timeout     value, the Initiator clicks Next in field 169. -   2) Instant Buddy request packets are generated and sent to the cell     transceiver of whatever cell the wireless device of the initiator is     registered. These packets contain data which identifies the     initiator and the recipient (proposed Instant Buddy) and are     addressed to the IP address of the Buddy Watch server 146 in     FIG. 16. The packets are recovered by the cell transceiver, sent to     the central switching system 102 and routed from there to gateway     148 where they are routed over wide area network 147 to the Buddy     Watch server (step 156). -   3) Buddy Watch server authenticates the initiator and the recipient     from data in the packet as a Buddy Watch subscribers. If either is     not a Buddy Watch subscriber, the server blocks the transaction by     not forwarding the packets to the recipient. Assuming both are     subscribers, the server forwards the Instant Buddy request packets     to the recipient's wireless device and these packets get routed in     the cell system (step 160) via the gateway, central switching system     and cell transceiver of the cell in which the recipient's wireless     device is registered. -   4) The proposed Instant Buddy's wireless device receives the packets     and displays an Instant Buddy Request screen (step 164) like that     shown at 171 in FIG. 19 (step 162). This screen shows the phone     number, Instant Buddy ID and Screen ID of the Initiator so the     recipient knows who has requested the Instant Buddy relationship.     The recipient can either accept or deny the relationship using     commands displayed at 173 and 175. -   5) If the Instant Buddy relationship is accepted (step 166),     processing proceeds to step 168 where an accepted packet is sent     back to the initiator's wireless device. If the Instant Buddy     relationship is denied, step 170 sends a denied packet back to the     Initiator device and the process is over (step 172) save for a     display on the Initiator device that the Instant Buddy relationship     has been denied. -   6) When the accepted packet arrives at the Initiator device, the     device shows an Instant Buddy accepted screen as shown at 177 in     FIG. 19 (step 174). This screen shows the phone number, Instant     Buddy ID and Screen ID of the recipient and provides commands to     accept or cancel the relationship at fields 179 and 181. -   7) If the Initiator accepts the Instant Buddy relationship (step     176), step 178 occurs where an accepted packet is sent back to the     Recipient through the Buddy Watch server. -   8) The Buddy Watch server records the existence of the new Instant     Buddy relationship (step 180), and both wireless devices start     sending their GPS position data in packets addressed to the Buddy     Watch server. The Buddy Watch server stores the position data from     each wireless device and forwards the packets to the other device     for updating of their displays. In the preferred embodiment, the     Buddy Watch server pulls an appropriate map from the MapQuest server     149 in FIG. 16 based upon the GPS position data of the Initiator and     sends that map and the GPS position data in packets addressed to the     Recipient. The Buddy Watch server then pulls an appropriate map from     the MapQuest server based upon the Recipient's position, and sends     that map and the Recipient's GPS position to the Initiator. Each     wireless device then displays the position of the other Instant     Buddy on the map provided by the Buddy Watch server.

An alternative Instant Buddy setup process is described next:

-   1) A call from one wireless device to another is initiated; -   2) After agreeing to establish an Instant Buddy relationship, the     initiator clicks on the Instant Buddy menu option; -   3) This causes an Instant Buddy Setup screen to be shown on the     initiator's device which has a first field which is auto-filled with     the initiator's phone number, a second field which is auto-filled     with an Instant Buddy ID, and a third field which is auto-filled     with a Screen ID for the Instant Buddy (this screen ID is a three     digit number which will be displayed with the position of the     Instant Buddy and is shorter than the Instant Buddy ID); -   4) The initiator fills in a timeout period for the Instant Buddy     relationship or accepts the default value of midnight and clicks a     Next command; -   5) The recipient's wireless device receives the instant buddy     request and displays an Instant Buddy Request screen that shows the     initiator's phone number, Instant Buddy ID and Screen ID and     displays an accept or deny command; -   6) The recipient either accepts or denies the Instant Buddy     relationship; -   7) If the recipient accepts the Instant Buddy relationship, this     fact is communicated to the initiator's wireless device which then     displays a screen which displays the recipient's phone number and     the recipient's Instant Buddy ID and his or her Screen ID and     displays an accept or deny command which the initiator can click on; -   8) If the initiator selects the accept command, both wireless     devices start exchanging GPS position data, but they do not if the     initiator decides to deny the Instant Buddy relationship.

FIG. 22 is a flowchart of the preferred embodiment for the instant buddy setup process. The initiator selects the instant buddy setup process—250, and enters the phone of the proposed new instant buddy—252. The initiator fills in timeout period—254, and instant buddy packets get routed to the Rubicon (Buddy Watch) server through the cell system—256. Rubicon server authenticates the initiator and recipient and forwards packets to cell system—258. The cell system routes packets to the cell where the proposed new instant buddy is—260, and the proposed instant buddy receives a message on her wireless device and displays the instant buddy request screen—262. The instant buddy sees the initiator buddy ID, screen ID and, optionally, his phone number—264, and accepts or denies the relationship—266, 270, 272. If accepted, a packet is sent back to the initiator's wireless device—268, which causes the initiator's device to show an Instant Buddy accept screen with the recipient's phone number, buddy ID and screen ID which the initiator must OK to establish the relationship—274. Steps 276, 278 and 280 handle the acceptance or rejection. In 282, if accepted, the Rubicon server records the new instant buddy relationship and both wireless devices start sharing location information with the Rubicon (X One) server where it is stored and forwarded to the other Instant Buddy. In 284, the initiator's device shows the Instant Buddy Accept screen. Steps 286, 288 verify the phone is collecting GPS data using the GPS sampler program.

User Interface Displays for Buddy Lists

FIG. 3 represents a display in the user interface which shows individuals on the phone's Buddy List as well as a group of buddies which has been given the name Tennis Team. In all the user interface screen shots in the figures of this patent application, a cross hatched area indicates an active status and is typically colored green on the phone display. For example, each cross hatched buddy in column 14 indicates that that buddy's location sharing is active and his position can be seen if the user clicks on that buddy using whatever navigation or pointing mechanism that is built into the cell phone user interface.

The Buddy Tracker software also has the ability to set up instant buddies with, for example, tow truck drivers. Display area 16 shows an instant buddy entry for an instant buddy named Inst01. For example, the user's car breaks down. The user calls a towing service, and finds out the tow truck driver has a cell phone with Buddy Tracker on it. The user dials the tow truck driver's cell phone and requests to be an instant buddy of the tow truck driver's phone. His phone is then set up as an instant buddy on the user's phone. After both phones are set up as instant buddies, each phone shows the location of the other phone on its moving map. This allows the tow truck driver to find the user tow truck customer and the user customer to know where the tow truck driver is.

FIG. 4 shows another user interface display that results from selecting the tennis team entry 18 on the Buddy List of FIG. 4 and then clicking on the Tracie entry. When the Tracie entry is clicked, the information in column 20 appears showing her full name, position, the time of her last fix, her distance from the user and her speed. A green status (cross hatched) means a buddy has his phone on with location sharing turned on and the phone is within range. A yellow status for a buddy (stippled) means the buddy was active and had his location sharing turned on, but contact with him has been lost for one reason or another. A darker green status (double cross hatched), means the buddy is active and has his location sharing turned on but he is out of the immediate area that can easily be shown on the phone's map display. For example, suppose most of the tennis team group are in the Northern California area, but one member of the group is in Los Angeles. If the member in Los Angeles has his phone turned on with location sharing on, his entry in the tennis team list will be shown as dark green meaning his position cannot be mapped.

The Mapit function shown at 22 in FIG. 4 is a function that can be invoked to map the location of Tracie Saka on the phone's display. If Tracie is within range, and the Mapit function is clicked, a display such as the one shown in FIG. 5 is rendered on the phone's display showing the general area and showing Tracie's position at 24 with a text box 26 superimposed on the map with Tracie's name rendered therein.

FIG. 6 is a user interface display showing a map rendering with the location history of a selected member of the tennis team rendered thereon. This display is rendered when the Mapit with History function 28 in FIG. 4 is selected. This display shows the path Tracie took to get to her current location by way of waypoints 30, 31, 32 and 33. In some embodiments, when a user wishes to record a waypoint for their current position, a command can be given that causes the current position of the phone to be reported and saved as a waypoint on the Buddy Watch server 146 in FIG. 16.

In other embodiments, a particular position such as the phones current position or a position selected by moving crosshairs on a map display on a phone can be sent as a meeting place to all buddies on a Buddy List. When such a command is given and a Buddy List is selected, the position of the meeting place and the designated Buddy List is put into packets addressed to the Buddy Watch server 146 and transmitted thereto where the information is stored. The meeting position is then packetized in packets addressed to all the buddies of the designated Buddy List, and those packets are addressed to the phones of the buddies on the designated Buddy List and sent thereto.

Referring to FIG. 7, there is shown a display of a screen showing positions and status of members of a selected group. In this example, Tracie and Karen's positions are known and their name boxes in the left column are displayed in some color such as green indicating they are within cellular coverage and their positions are known. On the other hand, Dean's name box is shown in some other distinctive color such as yellow (represented by single cross hatch) to indicate contact with Dean has been lost. This happens when a user travels outside cellular coverage. Because Dean's name box is currently selected by the cursor, the settings column has the last known information about Dean also displayed in the distinctive color and represented by a single cross hatch. These boxes show Dean's last known position fix time (box 34), his full name (box 36), his last known distance (box 38), and his last known direction, latitude, longitude and speed (boxes 40, 42, 44 and 46, respectively).

FIG. 8 is a screen display showing what is displayed when Dean is selected and the Mapit command in box 48 is given by double clicking on the box or by any other means. When this Mapit command is given, Dean's last known position is displayed with a circle of a distinctive color (such as red), as illustrated at 50.

Instant Buddy Display with Mapit Position Mapping

An instant buddy relationship also allows the location of the motorist, lost or injured hiker or other user to appear on the tow truck or ambulance driver's cell phone Mapit display.

FIG. 9 is an instant buddy display showing the instant buddy position. This display can be selected after an instant buddy relationship has been set up. This display shows the ID of the instant buddy in box 52, the time of the last position fix in box 54, the distance to the instant buddy in box 56. The direction to the instant buddy, latitude and longitude and speed of the instant buddy are shown in boxes 58, 60, 62 and 64, respectively. If the user selects the Mapit command in box 66 or the Mapit with history command in box 68, the phone display will change to a display like that shown in FIG. 8 or FIG. 6, respectively, with the current position of the instant buddy shown and the prior positions shown if the history option is selected.

Alternative Instant Buddy Setup Process: To set up an instant buddy relationship, the phone is given a command to display an instant buddy setup screen like that shown in FIG. 10. The display of FIG. 10 is used to establish an instant buddy ID in box 70, give the instant buddy a caller ID in box 72 (the instant buddy's caller ID or phone number is used by default). Box 74 is used to establish a timeout period at the end of which the instant buddy relationship is automatically terminated. The timeout period can be set to any interval in some embodiments, or to some selected interval from a drop down menu. Box 76 is used to establish the carrier the instant buddy is using. A cancel command is shown at 78 and a request command is shown at 80.

To start the instant buddy relationship, the request command is issued after the other boxes are filled in. Typically, a stranded motorist or hiker will call a tow truck or 911 and get the caller ID and carrier of the tow truck driver or rescuer. The stranded motorist or hiker will then enter this information in boxes 72 and 76. Box 70 shows an instant buddy ID which is automatically assigned by the system. After entering the information, the request command shown at 80 is selected. The screen of the rescuer's phone will then change to the display shown in FIG. 11. The information the requester filled in on the FIG. 10 screen will appear in boxes 82, 84, 86 and 88 on the stranded motorist or hiker's phone as well as on the instant buddy's phone (the tow truck or 911 rescuer). Commands for Denied and Accepted will also appear at 90 and 92 of the instant buddy's phone. If the instant buddy desires to accept the instant buddy relationship, he or she selects the accept command, and the tracking of the two instant buddies' positions will begin. Upon acceptance of the instant buddy relationship, each instant buddy's phone displays changes to the display shown in FIG. 9 from which the Mapit or Mapit with history command can be issued.

Corporate Supervision Setup Via Passcode

Corporations that wish to monitor the locations of their employees can use the system of the invention by using a corporate passcode. In this mode of operations, corporate employees are set up as a group with their supervisor as one member of the group. Each employee in the group can have his own buddies but he cannot delete the supervisor from the group. Only the supervisor can delete himself from the group of each employee's phone since only the supervisor has the passcode to change the group's members to delete himself. In one embodiment, the location information sharing is unidirectional from employees to supervisor but each employee can see the location of other employees on their phones but not the location of the supervisor. In this embodiment, the location sharing can be configured to be on only during working hours Monday to Friday. In other embodiments, the employees can see the locations of the supervisor as well as the locations of the other employees.

Timed Updates

The teachings of the invention contemplate doing position updates periodically at configurable intervals as well as a configuration option to do periodic updates as well as an update every x miles if a buddy in a group being monitored moves more than x miles between periodic updates. In some embodiments, the velocity at which a Buddy is moving or the amount of distance since the last update a Buddy has moved controls the frequency of the updates. Timed updates are handy for parents to monitor the positions of their children to make sure they do not move more than X miles from their home base. Position updates can be requested by a member of a Buddy List for position updates from the Buddy Watch server. The server receives positions reports from all the Buddy Watch phones registered with it and stores them and knows the Buddy Lists for each phone. When a request for a position update is received, positions of all the buddies on Buddy Lists of which that phone is a part will be transmitted as packets addressed to all the phones on all the Buddy Lists of which the requester is a part. In alternative embodiments, the position updates will be sent for all members of all Buddy Lists of which the requesting phone is a part, but will only be sent to the requesting phone to avoid excess network traffic. In other alternative embodiments, the requesting phone can designate a particular member of a particular Buddy List and request an update only for the position of the designated buddy. The position update will be sent only to the requesting phone.

Follow Me Mode

In some applications such as construction sites with large construction crews and one supervisor, it is useful for everybody working on the job to be able to find the supervisor but the supervisor does not care where anybody else is. In embodiments with this capability, the supervisor turns on the Follow Me mode, typically making a menu selection. This causes the supervisor's position to be reported to the Buddy Watch server on a regular basis in packets that have information in their headers or elsewhere which indicate they are Follow Me packets and which designates to which Buddy List this information is pertinent. The Buddy Watch server takes these position updates and packetizes them into packets addressed to each of the phones on the designated Buddy List and sends those packets to the Buddy List phones. Position updates from the phones on the Buddy List are not sent to the supervisor phone or any of the other phones on the Buddy List.

This Follow Me mode can also be done in a blind code mode. This means that the supervisor does not need to list everyone on his buddy list. This is an “open channel” mode. Any “follower” who wants to track the position of the supervisor only needs to list the supervisor's name and phone number on a buddy list of the “follower” phone. The supervisor enters a blind code in the Follow Me mode, and this code is published to all phones that have Buddy Watch software. This blind code entry and publication allows any follower to enter the blind code in a buddy list on the follower phone and thereafter to receive the supervisor's position reports. This entry of the blind code will give any follower the ability to receive position reports from the supervisor's phone, and the supervisor will not have to approve each buddy individually. This can be a great convenience since on some job sites, there may be hundreds or thousands of workers. The follower phone sends a packet to the Buddy Watch server telling it that the follower phone is in the Follow Me mode for the particular supervisor. This causes the Buddy Watch server to send position reports it receives from the supervisor phone to the follower phone, but the server does not send position reports from the follower phone to the supervisor phone. The follower phone does not send position reports to the Buddy Watch server when in the Follow Me mode. Disabling, removing or changing the blind code, stops Follow Me mode.

Buddies Only Mode

The Buddies only mode differs from the All On Follow Me mode and the Blind Code Buddies modes in that position reports are only received from Buddies on a specifically named Buddy List with specifically named Buddies. No blind code Buddies or Instant Buddy position reports can be received in this mode.

Waypoint Store Mode

This mode is useful for parents to monitor the travels of their children. In this mode, the child's phone periodically reports the child's position, and the parent can have the position reports sent to his phone (or computer in some embodiments). In some embodiments, position alert data can be configured to send an alarm signal to a parent if a child's position gets too close to a specified location or too far from the home location or some other location.

Request Update

This mode allows a specific user to request an update on the position of a specific Buddy. The requesting phone sends a request packet to the Buddy Watch server identifying itself and requesting a position update on a specified Buddy. The Buddy phone need not do anything other than do its normal operation of sending position updates to the Buddy Watch server. The update request causes the Buddy Watch server to provide a two-way update so that the requesting phone's location is sent by the Buddy Watch server to the Buddy phone and the Buddy phone's location is sent by the Buddy Watch server to the requesting phone. If the requester is part of a group, then the Buddy phone's location is sent to all phones in the group.

Timed Update

In this mode, periodic updates from the phone of a person such as a child or other person being cared for can be periodically sent to a list of parental or other supervisor destinations such as the parent's cell phone or email address. The sender phone may also be configured to send its location periodically to all others on a list. Updates on position can be every 15 minutes or some other configurable interval. In addition, each supervisorial user can request an update and the updates will be sent to every phone on the supervisorial list. If a phone on the list is not available, the update will indicate that no update is available, change the display to yellow and the status to unavailable but keep displaying the last way point.

Personal Bread Crumbs

This is an emergency feature which allows tracking down children or elderly people who are no longer responding to inquiries sent to their phone. This mode is useful for children who do not want to be watched but want a safety line to their friends and family in case something happens. A user who wishes to use this feature sets up their profile such that the Buddy Watch server checks in with them via their Buddy Watch enabled phone on a daily basis to determine if all is OK. The user must enter their secret code to confirm that all is OK. The phone prompts them to enter this code, and a certain number of prompts can be ignored before the system raises any alarms.

FIGS. 20A and 20B are a flowchart of one embodiment of the process of enabling the personal bread crumbs mode and how it works. Step 200 represents the process of enabling this mode. Typically, this is done by the user in selecting a menu command, but in some embodiments, it may be permanently configured to be on by the phone manufacturer. When this mode is enabled, the phone stores waypoints of the position of the holder of the phone periodically (step 202). The phone does not send the waypoints to anybody, but it does send data or a message to the Buddy Watch server that the personal bread crumbs feature has been enabled (step 204), so the Buddy Watch server starts a timer (step 206). The purpose of starting this timer is to establish intervals at the end of which an “Are you OK?” message will be sent to the phone which is in Personal Bread Crumbs™ mode.

Step 208 represents the process of monitoring the timer for a timeout event. This may take the form of a hardware or software interrupt. When a timeout occurs, the Buddy Watch server sends an inquiry to the phone inquiring if the user is OK (step 210). The phone then displays the “Are you OK?” message, and the user either enters his or her secret code to say they are OK or does not. If the user does not respond, processing proceeds back to step 206 to start the timer again as the user may simply be busy, have their phone off, be asleep, etc. However, after a configurable number of attempts to establish contact with no response, step 216 will conclude that the user may be in trouble and need rescue. In that case, processing is vectored by step 216 to step 218. In step 218, the phone is commanded by the Buddy Watch server to send distress messages out to predetermined phone numbers (five in the preferred embodiment) and/or email addresses. The voice mail message may indicate to check email for details. The email contains a content of a position report file that contains all the waypoints since the last OK was received. If there are no stored waypoints, at least one set of stored waypoints previously recorded are sent. The waypoints all provide latitude, longitude, date and time of recording.

The personal bread crumbs profile includes:

-   1) a list of emails to which messages should be sent; -   2) a list of phone numbers to which the prerecorded voicemails are     to be sent; -   3) frequency of OK confirmation the user needs to agree to (default     is daily at noon); -   4) the text of an email to describe the emergency situation to     readers which should include the mobile phone number, home phone     number, work phone number, home address and other pertinent     information; and -   5) whether or not auto attachment of waypoints to emails is to be     carried out.

In an alternative embodiment, step 218 represents the Buddy Watch server itself sending out the distress messages. In some embodiments, the distress messages are prerecorded voicemail messages which indicate the user may be in trouble and giving instructions to the recipient how to retrieve the position reports from the Buddy Watch server. Step 218 also represents the process of the phone sending its GPS position waypoints to the Buddy Watch server. In some embodiments, the prerecorded voicemails are sent to pre-determined phone numbers and the predetermined emails are sent to predetermined email addresses and include the GPS position reports in the text of the message. The email messages at least will include the personal breadcrumb position reports. These messages indicate to the recipients that there may be trouble and that they should start looking for the person who owns the phone.

FIG. 21 is a flowchart of another embodiment of a process to establish and use personal bread crumbs mode. In step 201, the user enables the bread crumbs mode, and in step 203 the mobile phone contacts the Buddy Watch server (also called the Rubicon server herein) and informs it that personal bread crumbs mode is on. GPS sample data is collected (205) and the server is contacted to start the “Are you OK” timeout interval (207). Timeout causes the phone to display an “Are you OK” message (209). Steps 211 and 213 handle the situation where the user does not enter a secret code and retries. Step 215 represents the Rubicon server response if the user does not respond to the “Are you OK” message properly and timely, said response involving sending whatever distress messages are set up in the preferences file. GPS location samples and timestamps are included in the distress messages (217) and the messages are sent to the users listed in the preferences file (219).

Relational Database Compatibility

The Buddy Watch server is configured and programmed to be compatible with business applications where the customer may desire to find individuals based upon their capabilities, certifications or the equipment they are carrying. By making the Buddy Watch fields of the Buddy Watch database available for search and/or integration into other business databases, a company such as a service based organization can determine which individuals have the proper certification to work on a specific problem and/or who have the appropriate tools and where those individuals are located relative to a site to which the company wishes them to be dispatched. The Buddy Watch server is programmed to provide information about the subscribers and their locations in a format which is compatible with the other business database structures of customers who are interested in having this data. Each position update received by the Buddy Watch server then is exported and automatically updates the customer database. This can be done over the Internet or over a dedicated local area or wide area network.

Radar Inclusion

The radar inclusion mode is a mode which allows police departments or fire departments or any other emergency response type organizations to instantly expand their buddy lists to predetermined lists of all available personnel. This is useful when it is necessary to know the whereabouts of persons to assist in an emergency situation or other situation. This feature may be used by police or other groups where the formation of a group may vary throughout the day. This feature can be used in conjunction with standard groups. How this feature differs is that a user does not need to be identified and only when the user comes within the “radar” range or radius does the user get included within the radar inclusion group.

City, County, State or Federal law enforcement or other agencies can offer two capabilities with radar inclusion. The first capability is to send an alert with a fixed target or to add a moving target to any individuals or groups without any input from the field officers. The target could be a suspect on the move. The target affords all the officers a better view of what is going on. The second capability allows the agency using the radar inclusion feature to “light up” the positions of other individuals or groups of individuals on a Mapit display so that one or more officers/firemen responding to an emergency can see the positions of possible reinforcements relative to their position. This is useful when groups that normally do not work together such as perhaps the fire and police need to work together. Details about each Buddy which is lit up on the Mapit display can be sent to any other Buddy in need thereof by a command to the Buddy Watch server issued by the controlling personnel of the agency.

In the instant messaging protocol packets transmitted from a phone to the Buddy Watch server, there is a field that can be left blank or a prefix can be put in. An agency using radar inclusion can put a code in this field and then all Buddy Watch phones/PDAs operating in radar inclusion mode are sent these packets and retain the Buddy whose information is in the packets in a group. This new group can be retained for a user programmable time up to 24 hours beyond the radar inclusion Buddy display disappearing.

The Buddy Watch server determines if a matching radar code is in range of a user and is not currently part of their active buddy list. If not they are added if the radar inclusion mode is active.

Split Groups

When a member of a group specified by a Buddy in that group for Mapit display is outside the radius set up in a Group Map Size configuration entry, then that member is split from the group and will not appear on the map of the group. However, that member which has been split from the group will have an entry in a distinctive color such as dark green on the list of active users in the group. Changing the Group Map Size configuration entry to a larger size may allow the split member to be displayed. If the location of the split member must be viewed but the Group Map Size is not to be changed, clicking on the member of the group which has been split from the Buddy List will cause the Mapit display to change to the locale of the split member and display the member's location on the map so long as the split member's Buddy Watch status is active.

Power Off or Disable Buddy Tracker

When the phone is turned off or the Buddy Tracker application is disabled, a final transmission to the Buddy Watch server of the location of the Buddy is made. The Buddy Watch server distributes this location in packets addressed to all the members of the group of the Buddy who just went to inactive status.

Targets

The Buddy Tracker software allows targets to be designated to specify meeting points, sites of emergencies or service call locations. Law enforcement agencies can use this feature to silently redirect personnel to the site of a crime or emergency without broadcasting the location on the radio for persons using police scanners to hear. Each target can have a user defined label associated with it and a message, photo(s) or other document(s) can be attached to the target. All the data defining the target, any label associated therewith and any photos or other documents is packetized in packets identifying the data therein as target data or attachments to the target. These packets are received by the Buddy Watch server and re-packetized addressed to all members of a group or a radar inclusion group or specific Buddies.

A target can be specified by any member of a group or by a dispatcher of a law-enforcement or other agency. Targets can be specified using a web browser. The target is a forward looking waypoint. This can be useful if groups are to meet at a predefined location and the first to arrive may find this is either not the right location or for some reason the meeting point should be changed. The target can be moved, and then packets containing the data of the new target location are sent by the Buddy Watch server to all members of the group with an alert message indicating the target has moved. Targets can be moved simply by dragging and dropping the target to a new location on the display on the web browser which is logged into the Buddy Watch server and which has invoked the target specification command. Once the target has been initially set, moving it to a new location creates a waypoint history. Each target can have a description associated with it, and if the target has been moved, the history can be viewed.

Out of Coverage Operation

When devices are out of cellular coverage, some limited operations are still possible based on the device. For devices with a full GPS receiver, the user can set targets or force waypoints that are stored. Each device may differ based on the amount of available memory.

If a Buddy takes his phone into areas of intermittent coverage, it offers a means of some contact. Additionally, one may visit a site on a rural road or other location out of coverage. Setting a target or forcing a waypoint from a phone or desktop computer which is not located at the target provides the location, but does not provide any idea regarding what is at the location. A picture phone at the location can capture a picture of the location, and this picture be associated with the target to give other Buddies in the group some idea of what to expect when they get to a meeting point or target.

When a user wants to return to the site, the saved target can be recalled and sent to other Buddies in a group or individually designated so a return trip can be planned. This provides the ability to return to spots not located on roads or at intersections such as pastoral settings.

Local maps when out of coverage would not show up on the user's phone when the Mapit command is issued. This is because the map pixels are sent from the Buddy Watch server to the phone after being retrieved from a mapping server such as Yahoo maps. When the phone is out of coverage, the map pixel packets cannot reach the phone and it cannot render a map. However, if the phone has a GPS receiver, it can store the point the user indicated he would like to capture, and, later when the phone is back in coverage, it can send the GPS location to the Buddy Watch server in a Mapit command packet, and get the map pixels back from the Buddy Watch server along with any attachments.

Phones with limited memory will decrease the frequency of position updates so as to not exceed the memory capacity.

Attachments to Targets and Waypoints

Attachments such as photos can be appended to targets and waypoints even with travelling outside a coverage area. Once the phone is back in coverage, the attachment to a waypoint for example will be sent to the Buddy Watch server and can be distributed to other users. Documents created with phone apps or pictures captured by the phone's built in camera can be attached, and, if the phone has a USB port, pictures captured by a digital camera or camcorder can be imported and attached.

Encryption of Data

The Buddy Watch software application is disabled and encrypted when it is downloaded to prevent other unauthorized users from installing and using it. The Buddy Watch application program is decrypted and enabled when the access code is downloaded after a subscription is purchased since the decryption key is or is part of or is encoded into the access code.

Access Codes

Access codes to enable the Buddy Watch application are designed to incorporate the phone number or phone serial number as part of the encryption key so that the access code can only enable one phone. Large groups with many phones, can ask for and receive access codes that allow operation across a large number of phones.

Access codes are downloaded to the phone from the cell provider's server or emailed to the user when the user provides their name, phone number, phone serial number and a form of payment. The application may be downloaded to a MAC or PC, and then configured on the personal computer before being uploaded to the phone by a computer-to-phone USB connection.

Targets

A member of a buddy group can market a target on a Mapit display, and that target location can be shared to all the members of the group and show up on their Mapit displays so they all know where to meet. Marking targets is done using cursors on the Mapit display on the phone. The user then designates the buddy list to which the marked target is to be published. Packets are generated in the Buddy Watch application on the phone which include the GPS location, any name assigned to the target and the identification of the buddy list to which the location is to be published. These packets are sent to the Buddy Watch server which then extracts the data and packetizes it into packets addressed to all the phones on the designated buddy list. These packets are then sent to the buddies on the list and the location of the target is extracted and posted on a Mapit display.

User Waypoints

The users can mark particular waypoints as they travel using the Mapit displays on their phones, and pictures or memos can be attached to these waypoints. In one embodiment, this is done by sending a packet with the location marked by the user to the Buddy Watch server and in that packet giving an identifier or pointer that will be contained in other packets which record the memo or photo to be attached to the waypoint. The Buddy Watch server then extracts the data from these packets and stores the user waypoint location with a pointer to the file in which the memo or photo is stored.

SOS Support

Each user of Buddy Watch can define a profile of buddies to which an SOS alert is to be sent in the case of emergency. The SOS alert message includes location, time and phone number (caller ID) and a preset message for email or Instant Message service and a prerecorded voice message. This data is sent in packets addressed to the Buddy Watch server when the user gives a command to send the SOS message. The Buddy Watch server then receives the SOS message, determines who it is from, retrieves the SOS profile stored on the server for that user and generates packets for email and IM and sends them on the internet and generates packets containing the digitized voice message and addresses them to the phones listed in the SOS profile and sends those packets to the cellular system central switching system 102 in FIG. 16 via internet gateway 148.

The SOS message protocol can be carried out by the Buddy Watch server either on demand from the user, or automatically in conjunction with any 911 call made from a phone which has a stored SOS profile. The SOS support configuration file contains data which defines which way the phone will act, and the buddies receiving the SOS messages will be aware of whether an 911 call was made or not. The buddies are actually in a better condition to help the caller since they can see the caller's position on their Mapit displays, and they may be closer to the caller and be able to act quicker than the 911 support personnel.

The preferred embodiment causes the SOS messages to be sent when the user dials **911**. A **411** dialed call will send the SOS messages to only active buddies whose phones are registered in the system and on with Buddy Watch activated.

The User Interface Genus

All species within the genus of user interfaces according to the teachings of the invention will display buddy lists and a list of buddies on each buddy list when that buddy list is selected. All species will display the specific information about a buddy when a particular buddy is selected including at least their current location and the time of the fix. All species will display a command or icon or menu choice that can be invoked to allow a user to turn off location sharing. All species will display commands, icons or menu choices to add, delete or edit buddy lists, or to add or delete or edit buddies.

Some species within this genus will also display one or more of the following items of information about individual buddies: speed, last contact, altitude or direction. Some species within the genus will provide icons, menu choices, etc. which a user can invoke to allow the user to select a map display with the location of a buddy displayed thereon. Some species within the genus will allow a user to give a command to request historical fixes which trace a path to the buddy's current position. Some species within the genus will allow instant buddy relationships to be set up to allow location sharing between a person in trouble and a rescuer.

The Server Genus

All servers programmed with Buddy Watch software will have functionality to:

-   1. either store map data for entire geographical areas that they     serve or to obtain pertinent map data from another server such as a     Mapquest™ server and pick the appropriate maplet that surrounds the     positions of buddies to be displayed and serve the maplet data to     Buddy Watch enabled phones; -   2. pick the appropriate maplet for each buddy list or buddy based     upon the center of gravity of the buddy positions of the buddies     within the selected buddy list and exclude buddies which are out of     the coverage area; -   3. render buddy locations on maplets based upon GPS location data     gathered from Buddy Watch applications running on GPS enabled cell     phones and PDAs; -   4. store user defined data that embodies each user's buddy lists and     buddies and configuration data; -   5. store at least some preference data that defines who can use the     server, e.g. only those with a valid Buddy Watch user ID and     password); -   6. request and receive update and regularly scheduled GPS location     data from users who have their Buddy Watch application turned on     their phones or PDAs and to distribute location data and maplets to     the phones and PDAs of the buddies on buddy lists who have their     Buddy Watch capability turned on; and -   7. turn Buddy Watch functionality on or off in terms of receiving     location data from users who have indicated they want their Buddy     Watch application turned off and turn off sharing location data of     buddies who have turned off their Buddy Watch application.

Various species within this genus: can calculate the center of gravity of the best fit for the maximum number of buddies that are within the coverage of one maplet; determine the proper maplet size to send to the client phone or PDA based upon configuration data which defines the screen size of the device; send the same size maplet to all clients; allow each client to determine its own maplet size; send maplets with buddies color coded to show who is out of bounds and who is in lost contact status; implement a permissive buddy list wherein a person cannot be added to a buddy list until they consent; implement timed updates for GPS position and scheduled cutoff times for position sharing; store auxiliary information about each buddy such as phone numbers, etc.; offer the functionality to allow each user to specify the maplet size they receive or specify a maximum maplet size for a buddy list; offer the functionality to request updates whenever a programmable delta time or delta position difference over the last update occurs; offer a user preference to turn on or turn off GPS position updates; the ability to cross communicate with other carrier's cellular systems to send maplets to and receive location data from users on other systems; function to enable or disable the Buddy Watch application without disabling location sharing with parental or supervisor units; storing as a preference or configuration data SOS emails and voicemail messages which can be sent out to email addresses and/or phone numbers specified in a configuration data file on demand or automatically when a 911 call is made.

The Client Application Genus

The client Buddy Watch application and phone or PDA platform genus collectively provide the following functionality:

-   1. the programmed phone or PDA must be able to retrieve GPS position     data directly or indirectly from a GPs receiver in the phone or PDA,     and it should be able to wirelessly send the GPS position data to     the Buddy Watch server either periodically or on demand from the     server, but one or another, it must be able to exchange position     information data with the server; -   2. the phone or PDA must have a display large enough to display     maplets and be able to download maplets from the Buddy Watch server; -   3. it must have Java or similar software to exchange digital data     with the Buddy Watch server using a wireless web application     program; -   4. it must be able to communicate with the phone's application     programmatic interface and any application programmatic interface of     the cell phone service provider to:     -   be able to receive maplets from the Buddy Watch server with         location data rendered thereon and display the maplets;     -   send location data and receive downstream messages and requests         from the Buddy Watch server.

An important species with this genus will be able to request software needed to execute commands given by the user from the Buddy Watch server, receive a download of the software requested, install it into random access memory and execute it to carry out the requested command. In other species, the software Apparatus and Process are to simplify Push to Talk walkie-talkie operations in cell phones.

FIG. 31 is a block diagram of the system for TalkControl to simplify cell phone walkie-talkie operations. Block 300 is a location determination component which functions to determine user locations. This can be done in the cell phones or the Rubicon server and provides a generic solution to extract location from GPS, J2ME location API or bespoke development for extracting Cell ID. If done on the server, the GMLC based solution us used. Block 300 also does distance calculations, location format conversion etc. LDG can expose a LIF based interface to location based services when applicable. This provides location determination flexibility as needed.

SBC component 302 functions to do buddy group/list management, mapping techniques, refresh based upon time or delta movement, geo coding, reverse geo coding, routing, etc.

CMC block 304 functions to provide local content to location based services. The content can be local maps or commercial/enterprise specific content. Multiple parties like commercial content providers, government establishments or enterprises will provide the content. This CMC component will provide a common API to extract content from multiple providers and provide the flexibility to choose any content provider based upon parameters such as accuracy, availability of content, rates, whether the content is the latest, etc.

The SRC block 306 is a software rendering component which provides multiple channel and device rendering, mobile application provisioning, service creation environment, OSS/BSS integration in both pre-paid and post paid modes, usage analysis reports and SNMP based system management software.

GSC block 308 provides alert and notification systems, personalization, payment integration etc.

Individual services block 310 provides tools and generic components to build individual applications in consumer and enterprise domains. Consumer services like child tracking, buddy location, location based advertisements for target user groups can be built. Enterprise services such as work force management, fleet tracking, emergency services, etc. can use the generic components.

FIG. 32 is a flow diagram of a process a user of a walkie-talkie enabled phone can initiate to join a talk group to enable subsequent walkie-talkie operations. This process greatly simplifies the process of signing up for walkie-talkie operations of a wireless carrier. A user who wishes to join a walkie-talkie talk group launches the TalkControl application, scrolls down to Join Group menu option, selects an Enter Tokens option, fills in her name, phone number, project ID, and Token and presses send. One or more packets are sent to the Rubicon server which authenticates the token and the recipient and creates a database entry. The Rubicon server then determines a time to add the user to the talk group and contacts a server of the wireless carrier to add a user. The Rubicon server logs onto the Carrier Server and adds the user to the appropriate talk group and receives a confirmation. The confirmation is sent to the user who initiated the process, and the Rubicon server logs out of the carrier server.

FIG. 33 is a flowchart of the process the Rubicon server carries out to automatically delete a user. Users in talk groups can be deleted automatically based upon a scheduled deletion time using this process. The Rubicon (X One) server compares the current date and time with a database for users scheduled to be deleted. If a user is to be deleted per schedule, the Rubicon server logs onto a carrier server and deletes the user from the appropriate talk group and receives confirmation. The Rubicon server then deletes the user from the talk group in its database and logs out of the carrier server. The Rubicon server then sends the deletion confirmation to the user phone.

FIG. 34 is a flowchart of the process the Rubicon server carries out to allow a supervisor to add a user. The supervisor launches the TalkControl application program and scrolls down to the add/edit/delete user menu option and logs in as a supervisor and presses send. The supervisor then selects User Name and selects Next to take him to the user screen where the user's name, phone number, and project ID are entered. The supervisor then edits the start date, end date, hours, days of the week for the active period when the user being added will be part of the talk group so that walkie-talkie service can only be had during the specified times. One or more packets are then generated addressed to the Rubicon server and encapsulated in a cellular system packet and sent. These packets get routed to the Rubicon server which authenticates the initiator and recipient, creates a database entry for the user and contacts the Carrier server and logs on. The Rubicon server then adds the user to the appropriate talk group and receives confirmation. The Rubicon server then adds the user to the appropriate talk group and updates its database and receives the confirmation. The confirmation is sent to the supervisor who added the user and to the user phone which was added to the talk group.

FIG. 35 is a flowchart of the process for a supervisor to edit a user in a talk group. The supervisor launches the TalkControl application and scrolls down to add/edit/delete user and selects that option. The supervisor logs in as the supervisor and selects edit user and selects a user already in a talk group and edits data in fields for name, phone number, project ID of the user to be edited and presses next. Start date, end date, hours, days of the week are then changed as desired. From that point, the process is the same as adding a new user.

FIG. 36 is a flowchart of a process for a supervisor to delete a user from a talk group. The supervisor launches TalkControl and scrolls down to add/edit/delete user and selects that. She logs in as a supervisor and scrolls down to delete a user and deletes data in name, phone number, project ID, start date, end date, hours and days of week field and presses send. One or more packets get routed to the Rubicon servers which authenticates the initiator and recipient. The Rubicon server then logs onto the Carrier server and deletes the user from the appropriate talk group and receives a confirmation. The Rubicon server receives the confirmation and updates its database to delete the user from a talk group. Confirmation is then sent from the Rubicon server to the supervisor phone and the user's phone, and the Rubicon server then logs out of the carrier server.

FIG. 37 is a flowchart of a process for a supervisor to issue a token. The supervisor launches TalkControl and scrolls down to add/edit/delete a user. She logs in as a supervisor and scrolls down to issue token menu option and selects it. She then scrolls down to select project to issue token menu option and presses next. The user selects token being issued and presses issue. The supervisor then informs the user of the project name and the token code. Packets are sent to the Rubicon server which removes the token from the list and replaces it with a new token. The Rubicon server then sends a message to the supervisor's phone to add the message send new token to the supervisor's handset.

FIG. 38 is a flowchart for the process of setting up preferences. The TalkControl application is launched on the handset and the user scrolls down to the add/edit/delete user option and presses select. The user logs in and presses send. The user then scrolls down to preferences and presses next. The user then selects the preference feature to be updated and presses select. This vectors processing to one of the four illustrated lines of processing to set the methods of notification as audio, vibrate or select auto login or set the new password or set a new ID. Processing then loops back to allow another preference to be selected and edited.

FIG. 39 is a flowchart for the process to allow a supervisor to request status. The supervisor launches TalkControl and scrolls down to view status. She logs in as a supervisor and presses send and then selects a user. The supervisor then scrolls and selects project to view status and presses next and scrolls down to select the project and the user and views the user's details.

FIG. 40 is a process flowchart of the process for a supervisor to create a group. The supervisor launches TalkControl application and scrolls down to create a group and presses select. She then logs in as supervisor and presses send and enters group name. A talk group is then automatically created. The supervisor sets the duration of the group, its start date, end date, days, hours and presses next. One or more packets addressed to the Rubicon server are then created and sent to the Rubicon server. The Rubicon server then authenticates the initiator and recipient and creates a database entry for a new group. The Rubicon server then contacts the carrier server and logs in and creates a talk group in the carrier server and receives a confirmation. The Rubicon server then adds the group to the appropriate talk group and receives confirmation. The confirmation is then sent from the Rubicon server to the supervisor and the Rubicon server logs out of the carrier server. The supervisor phone then receives a message on the wireless device displaying the group added profile updated request screen.

Although the invention has been disclosed in terms of the preferred and alternative embodiments disclosed herein, those skilled in the art will appreciate possible alternative embodiments and other modifications to the teachings disclosed herein which do not depart from the spirit and scope of the invention. All such alternative embodiments and other modifications are intended to be included within the scope of the claims appended hereto. 

What is claimed is:
 1. A method of sharing position data between a first device associated with a first user and a second device associated with a second user, the position data including first position data indicating a first location of the first device and second position data indicating a second location of the second device, the method comprising: receiving, from the first device, a first request to set up a position-sharing relationship between the first and second users; transmitting a second request to the second device, the second request inviting the second user to accept the position-sharing relationship; receiving a message from the second device indicating acceptance of the position-sharing relationship; establishing the position-sharing relationship responsive to the acceptance; transmitting the first position data to the second device and the second position data to the first device; receiving updated first position data from the first device and updated second position data from the second device; and transmitting the updated first position data to the second device and the updated second position data to the first device; wherein the second user is one of multiple buddies of the first user, each buddy being associated with a corresponding mobile device, including the second device, the method further comprising: noting position data for each of the mobile devices, including the second position data; calculating a center of gravity for the position data; and displaying the position data for a subset of the buddies based on the center of gravity.
 2. The method of claim 1, further comprising: receiving a third request from one of the first device and the second device to calculate a path between the first position and the second position; calculating the path between the first position and the second position; and transmitting the calculated path to the one of the first device and the second device.
 3. The method of claim 1, wherein at least one of the devices is GPS-enabled.
 4. The method of claim 3, wherein the GPS-enabled device is a phone.
 5. The method of claim 4, further comprising issuing a location update request to the GPS-enabled phone.
 6. The method of claim 1, wherein the first request includes a timeout for terminating the position-sharing relationship, the method further comprising terminating the position-sharing relationship after the timeout.
 7. The method of claim 6, wherein the timeout specifies a default value.
 8. The method of claim 6, further comprising receiving the timeout from the first user at the first device.
 9. The method of claim 1, further comprising, responsive to a request from the first device, sending a maplet to the first device, the maplet centered on the second location.
 10. The method of claim 1 carried out on a server executing non-transitory computer-readable instructions.
 11. The method of claim 1, further comprising publishing the first and second position data to a third device associated with a third user.
 12. The method of claim 11, wherein the publishing depicts the first and second users on a map.
 13. The method of claim 12, wherein the publishing identifies a relationship between the third user and at least one of the first and second users.
 14. The method of claim 1, further comprising storing information indicative of a relationship between the first user and the second user.
 15. The method of claim 14, wherein the relationship is a buddy relationship.
 16. The method of claim 1, further comprising storing information designating a fixed or moving target, associating a label with the target, and transmitting the label to at least one of the first device and the second device.
 17. The method of claim 1, further comprising storing information designating a fixed or moving target, associating a picture with the target, and transmitting the picture to at least one of the first device and the second device.
 18. The method of claim 1, further comprising storing information designating a fixed or moving target, associating a pointer to a camera file with the target, and transmitting content from the camera file to at least one of the first device and the second device.
 19. The method of claim 1, further comprising storing information designating a fixed or moving target, associating a message with the target, and transmitting the message to at least one of the first device and the second device.
 20. The method of claim 1, transmitting the first position data to the second device and the second position to the first device is responsive to position-update requests from the respective second device and first device.
 21. The method of claim 1, further comprising, after the second user accepts the position-sharing relationship, sending an alarm signal to the first device if the second device gets too close to, or too far from, a specified location.
 22. The method of claim 1, further comprising organizing the first and second users in a group of users, each of the users having a respective device, including the first device and the second device, and representing the group of users as a shape on a map encompassing the locations of the devices.
 23. The method of claim 22, further comprising sending an alert to at least one of the users in the group of one of the users leaves the group.
 24. The method of claim 1, further comprising defining a zone responsive to instructions from the first device and sending an alert to one or more devices when the first device enters or leaves the zone.
 25. The method of claim 24, wherein the zone may be used as a proximity room.
 26. The method of claim 24, where the zone is a circle with a user-determined radius.
 27. The method of claim 1, further comprising defining a zone by the first device and sending an alert to one or more devices when the second device enters or leaves the zone.
 28. The method of claim 1, further comprising, after the second user accepts the position-sharing relationship, communicating to the first device the time of the last fix of the second position data.
 29. The method of claim 28, further comprising communicating to the first device a distance of the second device from the first device.
 30. The method of claim 29, further comprising displaying via the first device a name of the second user, the time of the last fix, and the distance of the second device from the first device.
 31. The method of claim 30, further comprising displaying on the first device a position of the second device on a map.
 32. The method of claim 1, further comprising picking a maplet based on the center of gravity and displaying a location of each of the subset of the buddies on the maplet.
 33. The method of claim 1, further comprising relaying messages between the first and second users via the respective first and second devices during the position-sharing relationship. 